Electrically-controlled print box



April 14, 1925.`

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v A. A. BRACY ELECTRICALLY CONTROLLED PRINT BOX Filed April 50 1920 7 Sheets-Sheet 7 y y a l F212, .9195 411 y l; ffffl 97 .9.5

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Patented Apr. 14, 1925.

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AUGUST A. IBRACY, OF DETROIT, MICHIGAN.

ELECTBICALLYCONTBOLLED PRINT BOX.k

Application filed April 30, 1920. Serial No. 377,916.

To all fr0/rom t may concern:

Be it known that I, AUGUST A. BRACY, a citizen of the United States, residing at Detroit, in the county of lVayne and State of Michigan, have invented certain new and useful Improvements in Electrically-Controlled Print Boxes, of which thev following is a specification. s

This invention relates to photographic printing machines, and the primary object of this invention is to provide an improved printing machine, in lwhich the printing light is automatically cut oft after a predetermined length of time thereby eliminating the necessity of the printer timing the exposure by means of a watch or the like;

Another object of the invention is to provide an improved printing machine in which the automatic light cutoff can be adjusted so as to cut the light oftl at any desired time, thus rendering the device applicable for various types of printing paper.

A further object of the invention is to provide an improved printing machine, in which a circuit for the light is closed and the automatic stopping means set in operation when the hinged cover or platen is lowered into engagement with the printing paper, the automaticstopping means opening the circuit after a predetermined length of time.

Ay further object of the invention is to provide an improved means for closing the circuit and starting the automatic stopping means by an auxiliary lever, when the hinged cover or platen is notbcing used.

A further object of the invention is to provide a printing machine having an improved type of mask associated with the negative supporting means, which can be adjusted for various sized negatives andL which will effectively guard the printing paper from the light.

A further object of the invention is yto provide a machine having an improved re-l fleetor mounted directly in rear of and below the printing light for directing the rays thereof toward the negative holding means, the reflector being adjustable so as to vary the strength of the light` acting on the negative.

A further object of the invention is to provide a printing machine having indicating lights in circuit with the means for closing and opening the printing light circuit, thereby positively showing to the printer when the printing light is oft or on.

A further object of the invention is to provide an improved means for setting the means for opening the lighting circuit, so as to permit the printingy light circuit to be opened at any desiredftime and having means for resetting the printing light circuit closing means, so as to permit the light to act on the negative a. slightly longer length of time if the print has not been completed.

A still further object of the invention is to provide an improved printing machine of the above character which is durable and efficient in use, one that is simple and easy to manufacture, and one which may be placed upon the market at a reasonable cost.

Other objects and advantages of the invention will appear in the following detailed description taken in connection with the drawings, forming a part of this specitication, in which drawings:

Figure l is a vertical longitudinal section through the printing box or machine.

Figure 2 is a front elevation of the box showing the lid in an open position to disclose the interiormechanism of the box.

Figure 3 is a top plan-view of the improved printing box or machine.

Figure 4 is a. fragmentary vertical longitudinal section through the upper end of the print box looking in the opposite direction from Figure l. f

Figure 5 is a top plan view of the print box showing the platen in a raised position.

Figure 6 is an enlarged fragmentary vertical longitudinal section through tlie'print box showing the means of adjusting the mask.

Figure 7 is a fragmentary side elevation Figure l() isa fragmentary horizontal lil() section through the forward end ot the box showing the sliding plate moved outwardly oit the box.

Figure 'l1 is a 'tragn'ientary horizontal section illustrating the reflector for ithe printing light.

Figure l2 is a diagrannnatic view ot the circuit tor controlling the printing light, signal lights, reading light, and ruby light.

eterring to the drawings, in detail, wherein similar reference characters designate corresponding parts throughout the several views, the letter indicates the improved printing machine, which includes the casing l; the platen C; the mask D, tor the print-ing paper; the clock mechanism lll 'tor controll7 ig the circuit closingand opening mechant.. i l? Aiorthe magnet Ylor controllino' the printing light circuit il; the means l tor setting the opening Contact ot' the circuit closing and opening mechanism; 'he means ,l arranged in the path ol' the platen ttor starting and stopping the clock n'iechanism; the means l operatively connected with the platen 'for returning the circuit closing and opening mechanism ttor the. magnet G to a normal position; li, the means tor returning the circuit closing mechanism to normal position by hand; M, the switch closing device for the light-ino' circuit, which is oper: 'ed by the platen; la, the hand operating device tor closing the lighting switch mechanism, for returning the circuit closing and opening means to normal position and il'or operating the clock mechanism, starting and stopping device when the platen. is not in use; the retlector C' tor the printing light, the signals P tor indicatin when the printing light circuit is opened and closed; and the light Q provided` t'or reading the dials ot the setting means ot the opening contact ot the circuit closing and opening mechanism.

The casing B is oit boi; like coiiliriii'itti in and includes the top wall 20, the side walls Zl, the rear wall 92, and the liront wall Q3. 'lhe front wall Q3 is provided with a door closure 2l, which hingedly connected as at 25 to the tront wall Q3 ot the casing. rlhe door Q41t is provided so as to permit Athe interior mechanism to be viewed by the operator when it is necessary to makel repairs or the like there-to. The side walls ot the casing adjacent 'to theirl lower ends are provided with cleats 26 for the sliding plate 2T, which carries the clock mechanism E and the various wires for the light circuit. The plate 'T is arranged so that the same can be slid ont ot the casing B through the door :2f-ltornied in the casing, so as to permit repairs to be readily made to the electric apparatus and the clock mechanism when necessary. Directly above the plate 27' is arranged a horizontal plate or false bottom which secured by suitable cleats to the side walls 2l and the rear wall 22. A vertical partition 29 is arranged transversely olf the casing B at the central portion thereof and divides the casing B into the printing conipartment 3() and the ruby light compartment 8l. T he vertical transverse partition 29 terminates short of the upper end ot the -asing B and supports the upwardly and Yforwardly inclined partition 32 which is held in position by suitable cleats 33. rlhe inclined partition 32 has disposed therein a relatively thick colored glass 3l, which permits the light rays emitted trom the ruby light 2135 arranged in the coml'iratment 3l to shine inlo the printing light compartment 30. This gives the operator sullicient light to see in the compartment 3() when the printing light 3G is not illuminated. rl`he partition 29 carries the light socket 3T tor the ruby light 235 while the plate or talee bottom 2S carries the lamp socket 39 Yfor the printing light 36. The printing light 3G may be ot any desired candle power which is best suited lor the character ot the printing being done.

The side walls 21 are provided with openings 40 which are adapted to be closed by ruby colored glasses l1 which are slidably mounted in suitable. guide ways Ll2 secured above and below the openings Zl0. 'lhese colored glasses ll permit sul'licient light to be emitted from the casing so that the operator can see to accomplish his work in a dark room. The upper wall 2O ot the casing B is provided with a relatively large opening 48, and the walls ot the opening are rabbeted as at fil tor the reception ot a relatively heavy glass l5, on which the negatives are adapted to be placed. The light is arranged directly below the glass l5 so that the rays emitted theretrom may shine through the glass 45 onto the negative.

The platen C is provided vtor holding the printing paper in tirm contact with the negative and tor preventing the outside light :trom getting to the nfintingrpaper and spoiling the same. The platen C includes a relatively short 'llat section etti, and a relatively long tlat section -l-i, and the sections lo and /l-.T are hingedly connected together as at 48. The rear end ot' the section #le ot the platen C is hingedly connected as at fl!) to the transversely e-ltending bar 50 which is secured to the upper surface ot the top wall 2O at the rear edge thereof. The lower surfaces ot both sections l and i7 ot the platen C have secured thereto a Vtelt pad 5l, which is adapted to engage the printing paper. rthe hingedly connected sections -l-t' and 4l? are prevented l'rom collapsing by a sliding bolt 52, which is mounted in a suitable gnide secured to the upper surface ot the section 45T. The itoiwvard edge ol the section 4G carries a keeper ."ll and the bolt 52 is norn'ially held in engagement with the keep er by an expansion spring 55. Vwhich is coiled loo around the bolt. The outer' end of the bolt 52 is provided with an operating handle 56 by means of which the bolt may be Withdrawn from engagement with the keeper 54 against the tension of the coil spring 55 so as to permit the section 47 to be swung on the hinges 48, Asclearly shown in Figure l of the drawings, the coil spring 55 is confined between a collar 57 secured to the bolt 52 and a guide 58. The platen C is held in its lowered position against accidental displacement by a. suitable spring pressedbolt 59 carried thereby Which `is adapted to engage the keeper 60 carried by the upper Wall 2O of the casing B. A bracket 6lv is arranged at an incline to the vertical axis of the casing and is secured to the upper surface thereof by suitable fastening elements 62 and this bracket 6l is adapted to form a stop for the platen C to prevent the platen from being swungback over the rear end of the casing.

The upper `Wall 20 of the casing 'B supports the mask D which includes a pair of relatively thin L-shaped members 6l and 62, which are disposed with -their arms directed inwardly toward each other for providing a square frame for engaging the printing paper. TheL-shaped members 6l and 62 are preferably formed of sheet metal or the like and are adjust-ably mounted on the upper Wall 2O so as to adjust the size of the opening formed by the members. The adjustable means for the members 6l and 62 includes a pair ofV right angularly disposed shafts 63 and 64, and the shafts are supported by suitable bearings 65 at their rear terminals. These bearings G5 are secured to the upper Wall of the easing B as clearly shown in Figure 6 of the-drawings. The forward ends of the shafts 63 and 64 extend through the front Wall 23 and one of the side Walls 2l respectively, and the Walls are provided with. suitable bearings 66 for the reception of thc same. The shafts 63 and 64 are held against slidingmovement in the bearings 65 by means ofa .head G7 which is carried by the shafts and engages the rear faces of the bearings 65. The forward ends ofthe shafts 63 and 64 carry wheels 68 having secured thereto the operating handles 69 by means of Whichthe shafts may be readily rotated. screw threaded for a portion of their lengths and carry the travelling` nuts 70 the upper terminals of which are. provided With inwardly cesses 7l for the reception pins 72 carried by the L-shaped members 61 and 62. The pins 72 are carried by the lower surface of the L-shaped members intermediate their-ends and by rotating the shafts 63 and 64, the members 6ly and 62 will be: drawn towards or away from each other.

The shafts 63 and 64 arey extending reof thev Arranged in the casing B and carried by the sliding plate 27 is the clock mechanism E for operating the circuit closingl and opening mechanism F for controlling the magnet G, and'this clock mechanism F- may be of the ordinary ory any preferred type, and is secured to the plate 27 by suitable brackets 73. The clock mechanism E is provided With the usual Winding stem 74, and a second hand post, to which is secured the upstanding rod 75 for a purpose which Will be hereinafter more fully described. One of the Wheels of the clock mechanism is. extended beyond the casing ofthe clock and is indicated by the numeral 76 and the means J for starting and stopping the clock mechanism is adapted to engage the said Wheel 7 6 to prevent operation of the clock mechanism F. rlhe circuit closing and opening mechanism for the magnet control G of the light circuit H includes the substantially fiat cam shaped plate 77 Which is provided adjacent to one end thereof with a circular opening 7 8, Which frictionally receives thercylindrical end of the stem 75 secured to the second hand post. This plate 77 is adapted to be moved over the upper surface ofthe plate 28 into and out of engagement with the contacts 79 and 80, referred to as'the opening and` closing contacts respectively for the printing light circuit. When the plate 77 engages the circuit 'closing contact 80 one of the magnets G- is energized for closing the` circuit to the printing light, and when the plate 77 is mov-ed into engagement with the contact 79 the other magnet is energized for opening` the circuit'to the printing light. The plate 77 is of an open configuration and the inner Walls of ,the plate 77 is adapted to be engage-d by the means'K for returning the same to its normal position. The normal position of the plate 77 is in engagement with the contact 80 and when the clock mechanism is started, the same is gradilally moved towards the contact 79. The contact 80 is arranged in spaced relation to the contact 79 and merely includes the upstanding angle bracket-s 81 to which is secured one end of awire 82 Which leads to one of the magnets G. The contact 79 includes the upstanding post 82 which is adjustable toward and away from the plate 77 by the means I, Which Will be. hereinafter more fully described and this contactis electrically connected by means of a Wire 83, to the magnet opposite to the magnet to which the contact 80 is connected.` The plate 77 is also connected by a Wire 84 which as grounded as at 85 to the clock frame, and this Wire is provided for completing the circuit when the plate 77 engages either the contact 79 or SO.

. The printing light circuit H includes a pair of spaced conductor Wires 86 and S7,

lll)

which extend from the block 8S carrying the fuse plugs 89. The fuse plugs 89 are electrically connected to the main wires 90 leading from any suitable source of electrical energy. The -wire S6 leads to the armature 91 of the electrical magnet controlling means G which will be hereinafter more 'fully described. The wire ST leads to one terminal o'l the printing light and the opposite terminal et the printing light 36 has a wire 92 connected therewith which leads to one termina 93 of the electric switch 93 which forms part oit` the means lil for closing the electric light circuit 111 when the platen C is mored into engagement with the printing paper. A wire 911- ,leads 'from the opposite terminal 95 of the switch 93 to a contact 913 which is arranged in the path ot the armature 91 ot the electric magnetic control (l, and when the armature contacts with the contact 96, he circuit will be closed and the lamp 36 lit. fr wire 97 leads from the contact 99 ot the switch 92:3 to one Contact 98 et an electric switch 99 which terms a portion et the hand operating device N for closing the -switch mechanism for the light 36 and torreturning the circuit opening and closing means et the magnetic control G to its normal position and for operating the cloci; mechanism starting and stopping device. The opposite terminal 100 ot the electric switch 99 has con nected thereto a wire v101 which is electrically connected to the contact 95 et the switch 93 and it will be seen that when the contacts of the switch 99 are moved into engagement with each other the circuit H `11er the printing light 36 will be closed. The plate 2T yhas secured thereto suitable blocks 102, 1027 and 1011, which carry binding posts ttor the electric wires of the signal lights l), the reading` light Q, and the wires for controlling `the ei'iergizing o1 the magnets G. .i1-it pair olf wires 10:3 and 106 lead from the bindingl posts oit the 'fuse blocli SS and leads te the torn'iinals oit the primary coil 10T ot the traiis'lornier 108. lVii-es 109 and 110 are connected to the terminals of the secondary coil 111 ol the transformer 10S. rlhe wires 109 and 110 lead to binding posts 112 and 119 carried by the bloot: 102, and these posts are connected' by wires 111 and 115 to binding posts 116 and 117. rlhe wire S2 leading from the contact 90 coniiected to a binding post 11S and a wire 119 extends from this binding post to a binding post 120 carried by the block 101. The bini'ling post 120 is connected to a 'binding post 121 which has connected thereto a wire which extends to one terminal o1' the magnet 123 forming the magnetic control G. r1`he opposite terminal. of the magnet 12?) has connected thereto a wire which leacs to a binding` post 125 which is electrically connected to a binding post '126 carried by the block 10a. A wire 127 is electrically connected to the binding post 126 and extends to the binding post 117 o1 the block 102 and stated the binding post 117 .is electrically connected to the post 119 which is connected by the wire 110 to one terminal of the secondary coil 111. The wire 8st connected to the plate 77 extends to the contact post 116 which is electrically connected to the post 112 which is connected to the wire 109 extending to the opposite terminal of the Secondary coil 11,1. 'lhus it will be seen that when the plate TT is moved into engagement with 'the contact S0 a circuit will be closed through the magnet 1223 which will draw the armature 128 carrying the contact 91 into cngzupgcment with the contact 96 thus closing the circuit through the printing light 36 when one ot the switches 93 and 99 is closed. The wire S3 connected with the contact 79 extends to a post 129, which has electrically connected thereto a wire 130 which extends to the binding post 131 of the block 104, which is in turn electrically connected to the binding post 132. The binding post 132 has connected thereto a wire 1353 which leads to one terminal of the `magnet 131 which is arranged on opposite sides o1 the armature 128 from the magnet 12B. rllhc wire 136 is connected to the 'opposite terminal ot Vthe magnet 131 and is connected to the binding post 125 and when the plate 'TT is in Contact with the contact 79 the ciirrent will 'flow from the secondary coil 111 through the wire 109 through the binding posts 112 and 116 through `the wire S1- and the clock frame and the plate 77 to the contact F9 and then through the wire 83 to 'the binding post 129 through the wire 130 to the wire 133 through the magnet 131, then throughthe wire 1256, through the posts 12.3 and 1267 through the wire and then Vthrough fthe posts 11i and 113 to the wire 110 to the secondary coil. The magnets 123 and 12B-1f are secured to a 'iframe 'lili and this lranie has arranged thereon intcrnicdiate the magnets 123 and lil-t the uiislandini ears 1238 which pivotally support the arinature 12S. The contact 91 carried by the upper end oit the armature 129 is in a nature of a set screw so as to permit the :nl iustincnt thereof toward or `away from the contact 96. The contact 96 includes an angle plate 139 which is vsecured 'to the sliding plate LT and this angle plate r139 has its 'upper horizontal portion extending directly between the magnets 123 and 15S-li and disposed in the path et the contact 91 carried by the armature 1.28. 'lhe lower cud of the angle plate 139 has electrically connected thereto the wire 94. The trai'is'tornier 106 is provided 'for reducing the voltage oit the current so as to permit the use oit the magnets and 1211-, the signal lights 1) and thxx to the binding posts 117 and 116 which arev connected through the medium of the wires 114 and 115 binding posts 112 and 113 and wires 109 and 110 to the terminals of the secondary coil 111 of the armature 108.

r1`hus it will be seen that when the switch which is interposed in the wire 142 is closed, the current will tlow through the light Q.

The signal lights P includes a green lamp 151, which when lit indicates that the printing lamp is lit, and the red lamp 152 which when lit indicates that the printing light is out. The green light 151 has connected to its terminals wires 153 and 154 which extend respectively to the binding posts 155 which is electrically connected to the bind-- ving post 118 and to the binding post 113.

Thus it will be seen that the currentewill flow from the secondary coil to thewire 109 to the binding posts 112 and 116 through the Iwire 84 through the plate 77, through the contacts 80, through the wire 82, through the posts 118 and 155, through the wire 153, through the lamp 151, then through the wire 154 through the binding post 118 and through the wire 110 back to the secondary coil.

rlhe red lamp 152 has connected to its terminal the wires 156 and 157 which lead respectively to the binding posts 113 andl the binding posts 158. Thus it will be seen that when the plate 77 is in contact with the Contact 79, the current will flow from the secondary coil through the wire 109 through the binding posts 112 and 116, through the y wire r84. through the )late 77 Contact 79 wire' through the contacts 129 and 158` through the wire 157, lamp 152, through the wire 156, through the post 113 and then through the wire 110 through the secondary coil.

vThe means l provided for adjustiiiig 'the contact 79 toward or away from the plate 77 `for energizing the magnet 134 for opening the circuit to the printing light36 includes the arcuate plate 159, the outerend .of which carries the upstanding post 82 :forming the contact 7 9.l The arcuate plate or lever 159 is rigidly secured to a vertically extending rod 160, which is rotatably mounted in a suitable bearing 161 riveted or otherwise secured as at 162 to the horizontal plate or false bottom ,28. The rod extends upwardly throughthe top wall 20 of the box B and terminates in a head 163 which carries the outwardly extending` resilient arm 164, which isadapted to ride over the outer surface of the sector plate 165 secured to the upper surface of the top wall 20 ot' the casing B. The sector plate 165 is provided with a plurality of equidistantly spaced teeth or notches 166, in which the lower surface of the spring arm 164 is adapted to engage. Each one of these notches represents a unit o time such as a second, and a suitable dial plate167 is provided so that the operator may see exactly how many seconds he is setting the exposure for. It can be seen by turning the arm 164 that the post 82 constituting the contact 79 will be movedl toward or away from the plate 77 thus permitting the energizing of the magnet 134 at different predetermined times. rlhe means J provided for stopping and starting the clock mechanism when the platen C is raised or lowered includes a bell crank 168 which is pivotally mounted at its angle to an upstanding bracket 169 which is secured as at 170 to the casing of the clock mechanism E. The lower arm of the bell crank 168 is adapted to be moved into and out of engagement with the lbalance wheel 76 of the clock, so as to permit the starting and stopping of the clock mechanism when the platen C is lowered. The outer terminal of the upper arm of the bell crank 168 hasy pivotally connected thereto the upwardly extending link 171, which has its upper terminal secured to the outer end of a lever 172, which is pivotally mounted intermediate itsends upon a depending bracket 173.

The bracket 17 3 is secured to the inner surface of the top wall 20 and extends downwardly therefrom. The inner end `oit the lever 172 has pivotally connected thereto the upwardly extending rod 17 4, which slidably extends throughthe upper wall 20 of the casing and is disposed in the path of the platen C. Thus it will beseen that when the platen C is moved to its lowered position, the lever 172 will be 4rocked on the bracket 173 and move the lower arm of the bell crank 168 out of engagement with the clock mechanism E and thus start theclockmechanism in operation. This will move the plate 77 over the surfacerol the clock mechanism toward the Contact 79 as heretofore described.

The mechanism K -lor returning the plate 77 to its normal position, when the platen C is raisedfor removing the printing paper from the glass 45, includes a crank 175, which is pivotally mounted at its angle upon a pivot pin 17 6, carried by the inwardly extending bracket 177 which is riveted or otherwise secured as at 178 to one of theside walls 21 of the CSiIlg B, The Suter arm of the crank 175 carries the depending pin 179, which is adapted to engage the inner surface oit the plate 77. Vhen the crank 1175 is swung on its pivot 176, the pin will engage the plate and swineY the same with the rod 75, carried by the second hand post o1" the clock mechanism, to contacting' position with the contact thus energizing` the magnet 128 which will move the armature 128 out o't engagement with the contact 96, thus opening the circuit to the printing;` light and putting the same out. The outer end of the inner arm of the crank 175 has pivotally connected thereto as at 17 9 the connecting rod 180, which has its Outer end, which is connected to the cra-nk 175, curved arcuately as at 181. This rod extends rearwardly through the casing` and is slidably supported by the vertical partition 29. The rear end of the rod 180 is pivotally and slidably secured to the lower arm ot' a vertically disposed bell crank 182, which is pivotally mounted at its angle to a supporting' bracket 183, which is riveted or otherwise secured to the rear wall 22 of the casing. The upper arm of the bell crank 182 has pivot-ally connected thereto, as at 184, the upwardly ei;- tending` rod 185, which extends through a slot formed in the upper wall 20. The upf per end of this rod 185 is pivotally secured to a` pivot pin 186, which is carried by the hand operatedv lever 187. The rear end ot the hand operating' lever 187 is p'ivotally connected, as at 188, to the rear end ot a plate 189, which is riveted or otherwise securedl to the platen C. The plate 189 ei:- tends rearwardb7 of the platen C and is adapted to push the hand operated lever 1.8i forwardly when the platen C is in its raised position and when the lever is disconnected therefrom. The hand operated lever 187 is adapted to be normally carried by the platen C for movement therewith, by a pivoted catch 190 which is adapted to engage the upper and lower surface o1' the lever 187. Thus it will be seen that when the lever 187 is connected to the platen C for movement therewith and, when the platen is raised the rod 185 will be moved upwardly rocking the bell crank 182 on the bracket 188, which will push the rod 180 forwardly and swingij the crank 175 on its pivot and move the piu 179 into engagement with the plate 77 and return the same to its normal position in engagement with the contact 80.

The mechanism N ior returning,` the plate 77 to its normal position, for operating the clock starting and stopping` mechanism T and for operating the switch 99 for closine the circuit to the printineglie'ht 36 includes an upwardly extending' rod 191, which slidably extends through the upper wall 20, of the casing'4 B. This rod is arranged adiacent to the side edge'oit' the platen C and is adapted to be engaged by an outwardly ef;-

tendiirgY Vi'oot- 4192 carried by the lever 187 when the lever is disengaged 'from the platen C and moved forwardly on the upper surface of the casing'. The rod 191 is piyoted to a lforwardly extending' arm 19?, which is pivotally mounted at its rear end as at 194 to a depending; bracket 195 secured to the lower surface ot the top wall. 20.4 The forward end of the arm 198 is provided with an angular extending' 'toot 196, which is disposed directly above the inner end of the lever 172. Thus it will be seen that when the rod 191 is depressed by the lever 187, the lever 172 will be rocked thus moving the bell` crank 168 out of engagement with the wheel 76, thus allowing' the clock mechanism E to start. The arm 198 has pivotally connected thereto intermediate the foot 196 and the rod 191 a depending link 197 which is pivotally connected to the forward end ol' the switch lever 198 of the switch 99, which carries spring' Contact 98 which is adapted to engage the Contact 100 carried by the base plate 199 of the switch. The rear end e1' "the switch lever 198 is pivotally mounted as at 200 to a bracket 201 secured to the base plate 199. The contacts 98 and 100 are cennected to the wires 97 and 101 as heretofore described. Thus when the arm 193 is operated, the switch 99 will be operated and the circuit closed through the printing' light 86. Owing to the fact that the rod 185 is pivotally carried by the lever 187, the plate 77 will be moved to its normal position when the lever is raised. The lever 1.87 has its outer end provided with a suitable operatingl handle 202 whereby the lever can be readily raised and lowered by the printer. The operating lever 187 is only used when rela tively 'fast printing` paper is used for making' the print, at which time the platen C is moved to its rearward position and a ilat plate substituted therefor.

The switch 98 is adapted to be operated for closing' the circuit to the printing` light 86 by the mechanism M, when the platen (l is beingused and when the platen is nur-:ed to its lowered position. The mechanism h1 includes a rod 204. which is slidably mounted to the upper wall 20 oit the casing B and is located opposite to the rods 191 and 1711-. This rod 204; is arranged on one side o t th e platen C and is adapted to he engaged and depressed by an outwardly extentlin'e` vlool. 205 carried by the platen. The lower end ot the rod 2011; is pivotally connected as al 206 to the pivoted switch lever 207 ot the switch 96. The switch lever 207 carries the Contact 98 which is adapted to ene'ae'e the contact carried by the base 208 oi" the switch. The contacts 93 and 95 are connected to the wires 91 and 97 as heretofore described. The switch lever 207 is pivotall): mounted to a bracket 209 carried by the upper surface of the base plate 208 of the switch. The switch levers 297 and 198 of the switches 93 and 99 are adapted to be' normally held in a raised position by suit-` able springs, which are coiled around the pivot pins of the levers-and engage the levers and the base plates of the switches. Thus it will Abe Iseen that the rods 2011 and 191 are normally held in a raised position. The lever 172 is normally held in a raised position and the bell crank 16S in engagement with the wheel 76 by means of a contractile coil spring* 210 which is secured to the lever adjacent to its inner end and to the inner surface of the wall 20.

The reflector O is arranged in the print ing compartment 30 directly below the printing' light 36 and includes a substantially rectangular frame 210 which carries the mirror 211. The frame 210 is provided with depending' ears 212 which receive the trans versely extending rod 213. The frame is prevented from movement on the rod 213 by suitable set screws 214, which are carried by the ears and are adapted toengage the rod. The terminals of the rod 213 are rotatably mounted in suitable bearings 214 carried by the side walls 2O of the casing, and one terminal of the rod carries the operatinp` handle 215 whereby therod may be readily turned for adjusting; the mirror in relation to the light 36. The bearings 214 of the rod 213 are made so as to form a relatively snug fit for the rod .and thus permit the mirror to be held in adjusted posi- 1 tion by frictional contact between the rod and bearings. The signal lightsr161 and 162 forming the signal mechanism for designating when the circuit through the printing' light 36 is opened or closed are arranged adjacent to the spring' arm 164 and are carried by the wall 2O of the casing B.` The reading light Q is also carried by the upper surface ot the top wall 20 and is provided with a suitable rellector 216, which prevents the entrance of light onto the printing paper. This light Q is provided for permitting' the printer to see while setting the spring` arm 164. The switch =150 provided for the reading light (a), is provided with an operating button 217 which slidably eX- tends throupjh the upper wall 2O of the casing' and this button is adapted to be depressed to operate the switch when it is desired to close the' circuit for the reading` lip-ht. depending rod 213 is rotatably carried by the upper wall 2O of the casing and extends therethrough and forms a part et' the hand operated meansL for returning the plate 7 7v to its normal position. The lower end ot the rod 21S is provided with an ollset terminal 219 which is detachably fitted in a socket 220 formed on the plate 77 in rear oi' the rod 75. The upper end ot the rod 218 carries the head 229 by means of which the rod may be readily turned by the printer for moving' the plate 77 to its normal position. The head 220 carries the pointer 221, which is adapted to cooperate with the dial 222, so that the printer may see exactly how :far the plate 77 has moved or rthe exact length of time taken for the plate to move a certain distance.

In operation of the improved printing box, the printer sits or stands at the `liront end thereof and places a negative on the up* per surface of the glass plate 4:5 and adjusts the members 61. and 62 constituting' the mask D by-means ot' the cranks 69 to the size oi the negative. The j .n'inting` paper is then placedv in position and the platen C is moved downwardly intor engagement therewith and held in its lowered position by means of the spring pressed bolt 59. `Prior to the lowering of the platen C the spring' arm 164 is moved, so to adjust the contact 79 in relation to the plate 77 and thereby give the light a predetermined length of time to act upon the negative. lVhen the platen is moved to its lowered position the rod 17e?.

will be depressed, moving the bell cranl158 i out of the path of the balance wheel 76 and thus start the clock mechanism in operation for moving1 the plate 77 toward the contact 79. Simultaneous with the depressing' of the rod 174, the switch 93 will be closed by i*- means of the rod 204 being` depressed by the outwardly extending' foot 205, which will lightfthe printing' lamp 36. lhen the plate 77 has been moved by the clock mechanism E to the contact 7 9,'the magnet 134- will be energized as heretofore described, thus movl ing` thecontact 91 carried by the armature 178 away lfrom the contact 96 thus putting out the printing light 36. The printer may then draw baclr the bolt 52 and release the catch 59 and lift the forward section 17 of the platen up to see it the print has been finished. lf the print is finished the platen is entirely raised oit ot the plate 45, and the print removed therefrom and a new piece oi printing paper placed on the negative, and the platen then again moved to its lowered position and the' process repeated as above described.

It the print is not linished when the printer raises the ltorwafrd section 47 of the platen, the section may he then lowered and latched in position by the spring pressed bolt 59 and the plate 77 moves back to its normal position in cngageinent with the contact S() by the rod 21S andthe spring arm 161 reset so that the circuit will remain closed tor another short space of time. The i'nagnet 134: will again be energized when the plate 77 comes into engagement with the contact 79 and the light automatically shut oli. The platen may then be lifted and the finished print removed.

lf so desired a plate 225 may be provided for engaging` the foot 205 and the rod 204 lim tit)

Vl'or positively holding;- the .sv-:itch in engagement with the rod and the rod in its lo'.vercd position. The plate Q25 is pivotallv connected to the upper wall Q0 hy means of a pivot pin 29,6 and a thumh piece Q27 .is formed on the switch to permit the ready operation thereof. One end ot the plate ma)T he slightljv turned up as at 22S 'for iliacilitating the engagement ot' the catch with the toot 205 or rod 20d.

ll'lhen printing with 'fast paper, and it is not desired to use the platen, the catch. 'i90 may he operated ttor disengaging; the lever 18T 'from the 'platen and the printing paper can then he placed on the upper surface of the negative and the lever 187 moved downwardly which will operate the machine in the same manner the platen.

From the foregoing' description it can he seen that an improved printing hex has heen provided, in which the circuit for the printing' light will he automatically opened and closed hy the raising' and lowering' of the platen.

Changes in details may be made without departing` from the spirit. or scope oli the invention; but,

I claim:

l. ln a photographic printingl apparatus, a casing' having a lamp therein and provided with means 'for receiving a negative and a sensitized element, an electric circuit for the lamp, a magnetic switch interposed in the circuit, a motor arranged to control the energizing of the magnetic switch, and means operated 'from the means for receiving' the sensitized element for controlling' the operation of the motor.

2. In a photographic printing apparatus, a casing' having' a lamp interposed therein and provided with means 'for receiving' a negative and a sensitized element, an electric circuit 'for the lamp. a magnetic switch arranged in the circuit tor controlling' the openingand closing' of the same, a motor arranged to control the energizing' of the magnet-ic switch, a platen 'for holding the sensitized element, and means operated hy the platen tor starting'` and stoi'iping the motor.

3. gli photographic printing' apparatus havingr a casing' provided with a lamp therein. and incans 'tor receiving; a negative and a f1ensitizcd element, in electric circuit -for the lanip` a magnetic switch arranged in the circuit Ator opening and closing' the circuit. a clock mechanism arranged to control the energizing oi? the magnetic switch, a platen ttor holding; the sensitized element, means tor controlling' the starting' and stopping' of the clock mechanism. and means et permitting' the operation olf said control means h v the platen or independent ot the platen.

ft. ln a photographic printing' apparatus. a casing having a lamp therein and provided with nicans il'or receiving' a. negative and a sensitized elen'ient. an electri circuit `for the lamp, a pair oi" norinallvY opened switches arranged in the circuit, a platen, means operated by the platen Vl'or operating;v

one of the switches, and means indepeni'h, oi the platen Jfor operatingh the other switch.

5. In a photographic printirng app'..in/rus.y a casing having a lamp therein and provided with means -for receiving' a negative and a sensitized element, an electric circuit 'tor the lamp7 a magnetic switch interposed in the circuit, a clock mechanism tor controlling' the energizing' of the magnetic switch7 a second switch interposed in the circuit., a platen for holding the sensitized element, and means operated by the platen 'lor starting' and stopping the clock mechanism and for operating the second switch.

t3. ln a. photographic printing; apparatus, a casing` havingY a lamp therein and provided with means 'for receiving a negative and a sensitized element, an electric circuit'. ilor the lamp, a magnetic switch interposed .in the circuit including' a pair ot spaced magnets arranged to move the switch to an open or closed position, an electric circuit. for the magnets a cloeli mechanisxL 'for controlling the energizing ot the magnets, and means for starting and stopping` the clocl: mechanism.

7. ln a photographic printing' apparatus. a casing having a lamp therein and provided with means for receiving' a negative and u sensitized element, an electric circuit ttor the lamp. aA magnetic switch interposed in the circuit, a circuit ior the switch a clock mechanism 'for controlling' the energizing; ol the magnetic switch, means tor starting the cloclc mechanism and means 'for stopping' the clock mechanisni at a predetermined time.

S. In a photographic printing' apparatus. a casing' having a lamp therein and provided with means tor receiving' a negative and a sensitized element:l an electric circuit 'tor the lamp. a. magnetic switch interipuosed in the circuit including a pair of spaced nn nets, an armature arranged hctween thel un nets carrying' the movable contact', ot the switch and arranged to entrado the stationary Contact ot the switch, a cloel iuecl'.anisni.y a 'lnovahle electric conducting' nienihor con nected to the clock mechanism and oi'iieratcd therehy. a normallyv open electric circuit tor each o'l. the imrejiietxs includii i' a pair oi' spaced contacts. each oil" the circuits ol" the. magnets having one of their contacts disposed on opposite sid/fs ol`v the member.r the other contacts ot the circuits 'for the magnets heine' attached to the .neinher7 and means 'for adjusting one ot the spaced contacts ol" one oit the circuits for the magnets toward and away 'from said member.

9. ln a photogrrailvhic printing; apparatus. a casing having a lai'np 'therein and prf'nxided llt) tween the magnets carrying the movable contact of the switch, the stationary contacts of the switch being disposed in the path of the movable contact otl the switch, an electric circuit for each of the magnets, a switch interposed in each of the circuits for the magnets and each including a spacedv stationary contactl and a movable contact, the movable contacts of the last mentioned switches being disposed between the stationary contacts of said switches, a clock mechanism operatively connected to the movable contacts of the last mentioned switches for vmovement away from one ot the stationaryv contacts toward the other contact of the last mentioned switches, and means for starting and stopping the clock mechanism. l

10. In a photographic printing apparatus, a casing having a lamp therein and provided with means for receiving a negative and a .sensitized element, a normally open electric circuit for the lamp including a stationary and a movable contact, a magnetic switch interposed in the circuit including a pair of spaced magnets, an armature arranged between the magnets carrying the movable contact the stationary contact being disposed in the path of the movable contact, an electric circuit for each of the magnets, an electric switch interposed in each of the circuits for the magnets, one ot' the switches having a stationary contact,l the other switch having a movable contact, a removable plate` the other contacts of the switches heilig' electrically connected to the plate, a clock mechanism arranged to move the plate from the last mentioned stationary Contact to the last mentioned adjustable contact, means for starting and stoppii'ig the clock mechanism, and means 'for returi'iing the plate to its normal position.

11. ln a photographic printingapparatus, a casing having` a lamp therein and provided with means for receiving a negative and a sensitized element, a normally open electric circuit for the lamp including a stationary contact and a movable contact, a magnetic switch interposed in the circuit including a pair of spaced magnets, an armature arranged between the magnets carrying the movable contact the stationary contact being disposed in the path of the movable contact, an electric circuit for each of the magnets, an electric switch for each'ot the magnet circuits, one of the magnets being arranged to move the armature away from the stationary contact, the other magnet being arranged to move the armature in engage` ment with the stationary contact, a clock mechanism, av movable clock mechanism, one of the lswitches in the circuit for one of the magnets having a contact arranged on one side of the plate, the other switch ot' the circuit for the other magnet having a contact arranged on `the opposite side of the plate, the other contacts ot' the switches for the circuits for the magnets being connected to the plate, an arcuate arm carrying one of the first mentioned contacts of the switches for the magnet circuits arranged on one side of the plate, a rod connected to the arm for adjusting the same, an operating head connected to the rod and arranged on the outer surface of the casing, a sector plate having' teeth formed thereon arranged adjacent to the head, and a spring arm carried by they head arranged to engage the sector plate, a platen, and means operated by the platen for starting t-he clock mechanism and for returning the plate to its normal position after being operated by the clock mechanism.

12. ln a photographic printing apparatus, a casing having a lamp therein and provided with means for receiving a negative and a sensitized element, an electric circuit for the lamp, a magnetic switch interposed in the circuit, a circuity for the magnetic switch, a clock mechanism, a plate carried by the clock mechanism arranged to control the energizing of the magnetic switch, means for starting and 1 stopping the clock mechanism, a platen, means operated by the platen for returning the plate to its normal position after being operated by the clock mechanism, and means independent of the platen for returning the plate to its normal position after being operated by the clock mechanism.

13. In a photographic printing apparatus, a casing having a lamp therein provided with means fory receiving a negative and a sensitized element, an electric circuit for the lamp, a magnetic switch interposed in the circuit, a .p second switch interposed in the circuit, an electric circuit for the magnet plate carried by the switch, a platen hingedly carried by the casing, a clockmechanism, a plate operated bythe clock mechanism arranged to control the energizing of the magnetic switch, a lever carried by the casing, means for operatively connecting the lever to the platen, and means operated by the lever and platen for starting and stopping the clock mechanism, for closing the second mentioned switch and for returning the plate to its normal position after operation by the clock mechanism.

14. In a photographic printing apparatus, a casing having a lamp therein and provided with means foi-.receiving a negative and a sensitized element, an electric circuit for the lamp, an electric magnetic switch interposed in the circuit. a clock mechanism, a plate operated by the clock mechanism for controlling the energizing of the magnetic tir switch, a second switch interposed in the circuit, a platen, means operated by the platen for closing;l the second switch7 a lever pvotally carried b v the casing and arranged to close the second mentioned switch and means actuated by said lever 'for starting' and stopping the operation ot the clock mechanism and tor returning the plate to its normal position.

l5. ln a photographic printing apparatus, a casing' having` a lamp therein and provided with means ttor receiving a negative and a sensitized element, an electric circuit tor the lamp, a magnetic switch interposed in the circuit, a clock mechanism, a control plate carried buv the clock mechanism for controlling the energiziircv ot the magnetic switch, an indicator plate arranged on the upper surface ot the casino', means carried by the control plate 'lor cooperating' with the indi cator plate 'tor indicating` the movement ol' the control plate, a second switch arranged in the circuit, a third switch arranged in the circuit, a platen hingedly connected to the upper surlface ot the casing', means operated by the platen 'l'for closing;` the second mentioned switch, a lever pivotallv connected to the casing', means carried by the platen for connecting' the lever thereto, means operated by the lever .tor operating' the third mentioned switch7 and means operatively connected with the lever tor startingand stopping; the clock mechanism and for turning` the control plate to its normal position.

16. In a photographic apparatus, a casing having' an upper wall provided with means Vfor receiving); a negative and a sensitized element, a partition dividing' the casing' into a pair ot con'ipartments and having' a verti-allv disposed lower portion and an inclined upper portion extending' bevond one end ot the means 'for receiving' the ne; a tive and sensitized element, the inclined portio'n o'l" said portion having` a portion l'orlned olfY translucent material a printing lin'ht arranged in one con'ipartnient, and an exhibiting; light in the other compartment,

17. lln a photographic printing apparatus, a casing having a lamp arranged therein and provided with means tor receiving a negative and a sensitized element, an electric circuit tor the lamp, a magnetic switch interposed in the circuit7 a clock mechanism ai ranged in 'the casing, a plate carried by the clock mechanism l'or controlling` the energizing` o'l' the magnet, signal lights, circuits 'lfor the signal lights, and means operated b v the plate for closing and opening` the circuit 'for the signal light.

18. In a photographic printing apparatus. a mask including' a pair of L-shaped meinbers, right angularlj)7 disposed rotatable shafts, the shatts beine' screw threaded Vl'or a portion ol their lengths, travelling nutsl arranged on the threaded portions o't tin` shafts and dependingl lingers carried by the l.slniped members 'l'or detachabl)7 engaging the nuts.

19. ln a photographic printing machine, a mask including a pair ot independent L- shaped members, a support for the masi;` right angularly disposed screw threaded shafts carried h v the support, travelling nuts arranged on the shafts, means connecting' the lvl-shaped plates with the nuts, and meansI Jfor rotating;l the shafts.

Q0. in a photographic printing,- apparatus, a casing-having a lamp therein and provided with means lor receiving` a negative and a sensitized element, and an adjustable reflector arranged in the casing below said lamp and to one side thereof.

2l. In a photographic printing' a1p paratus, a casing' having' a lamp therein and provided with means l'or receiving' a negative and a sensitized element, a rel'lector arranged below and to one side thereot the lamp, and means for adjusting the angle ot the reflector in relation to the means tor receiving the negative and sensitized element.

In a photographic printing` apparatus, a casing' lawine' a lamp therein and provided with means l'or receiving a negative and a sensitized element, a shal't arranged transversely ol'V the casing', means for rotating the shaft, a trame carried b v the shalt, and a mirror carried by the trame.

AUGUST A, BRAGY.

lill 

